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<div><span class="t-lines"><span><span class="t-mark-rev t-since-c99">(C99)</span></span><span><span class="t-mark-rev t-since-c99">(C99)</span></span><span><span class="t-mark-rev t-since-c99">(C99)</span></span></span></div>
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<div><a href="io/fprintf.html" title="c/io/fprintf"><span class="t-lines"><span>printf</span><span>fprintf</span><span>sprintf</span><span>snprintf</span></span></a></div>
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<div><a href="io/vfprintf.html" title="c/io/vfprintf"><span class="t-lines"><span>vprintf</span><span>vfprintf</span><span>vsprintf</span><span>vsnprintf</span></span></a></div>
<div><span class="t-lines"><span></span><span></span><span></span><span><span class="t-mark-rev t-since-c99">(C99)</span></span></span></div>
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<div><span class="t-lines"><span><span class="t-mark-rev t-since-c99">(C99)</span></span><span><span class="t-mark-rev t-since-c99">(C99)</span></span><span><span class="t-mark-rev t-since-c99">(C99)</span></span></span></div>
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<p>The <code>&lt;stdio.h&gt;</code> header provides generic file operation support and supplies functions with narrow character input/output capabilities.
</p>
<p>The <code>&lt;wchar.h&gt;</code> header supplies functions with wide character input/output capabilities.  
</p>
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<div id="toctitle"><h2>Contents</h2></div>
<ul>
<li class="toclevel-1 tocsection-1">
<a href="io.html%23Functions"><span class="tocnumber">1</span> <span class="toctext">Functions</span></a>
<ul>
<li class="toclevel-2"><a href="io.html%23File_access"><span class="tocnumber">1.1</span> <span class="toctext">File access</span></a></li>
<li class="toclevel-2"><a href="io.html%23Direct_input.2Foutput"><span class="tocnumber">1.2</span> <span class="toctext">Direct input/output</span></a></li>
<li class="toclevel-2"><a href="io.html%23Unformatted_input.2Foutput"><span class="tocnumber">1.3</span> <span class="toctext">Unformatted input/output</span></a></li>
<li class="toclevel-2"><a href="io.html%23Narrow_character"><span class="tocnumber">1.4</span> <span class="toctext"><span>Narrow character</span></span></a></li>
<li class="toclevel-2"><a href="io.html%23Wide_character"><span class="tocnumber">1.5</span> <span class="toctext"><span>Wide character</span></span></a></li>
<li class="toclevel-2"><a href="io.html%23Formatted_input.2Foutput"><span class="tocnumber">1.6</span> <span class="toctext">Formatted input/output</span></a></li>
<li class="toclevel-2"><a href="io.html%23Narrow_character_2"><span class="tocnumber">1.7</span> <span class="toctext"><span>Narrow character</span></span></a></li>
<li class="toclevel-2"><a href="io.html%23Wide_character_2"><span class="tocnumber">1.8</span> <span class="toctext"><span>Wide character</span></span></a></li>
<li class="toclevel-2"><a href="io.html%23File_positioning"><span class="tocnumber">1.9</span> <span class="toctext">File positioning</span></a></li>
<li class="toclevel-2"><a href="io.html%23Error_handling"><span class="tocnumber">1.10</span> <span class="toctext">Error handling</span></a></li>
<li class="toclevel-2"><a href="io.html%23Operations_on_files"><span class="tocnumber">1.11</span> <span class="toctext">Operations on files</span></a></li>
</ul>
</li>
<li class="toclevel-1 tocsection-2"><a href="io.html%23Types"><span class="tocnumber">2</span> <span class="toctext">Types</span></a></li>
<li class="toclevel-1 tocsection-3"><a href="io.html%23Macros"><span class="tocnumber">3</span> <span class="toctext">Macros</span></a></li>
<li class="toclevel-1 tocsection-4"><a href="io.html%23See_also"><span class="tocnumber">4</span> <span class="toctext">See also</span></a></li>
</ul>
</td></tr></table>
<h3>
<span class="editsection">[<a href="http%3A//en.cppreference.com/mwiki/index.php" title="Edit section: Functions">edit</a>]</span> <span class="mw-headline" id="Functions">Functions</span>
</h3>
<table class="t-dsc-begin">

<tr>
<td colspan="2"> <h5> <span class="mw-headline" id="File_access">  File access </span>
</h5>
</td>
</tr>

<tr class="t-dsc-sep">
<td colspan="2">
</td>
</tr>
<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div><a href="io/fopen.html" title="c/io/fopen"> <span class="t-lines"><span>fopen</span></span></a></div></div>
</td>
<td>   opens a file  <br> <span class="t-mark">(function)</span> 
</td>
</tr>

<tr class="t-dsc-sep">
<td colspan="2">
</td>
</tr>
<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div><a href="io/freopen.html" title="c/io/freopen"> <span class="t-lines"><span>freopen</span></span></a></div></div>
</td>
<td>   open an existing stream with a different name <br> <span class="t-mark">(function)</span> 
</td>
</tr>

<tr class="t-dsc-sep">
<td colspan="2">
</td>
</tr>
<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div><a href="io/fclose.html" title="c/io/fclose"> <span class="t-lines"><span>fclose</span></span></a></div></div>
</td>
<td>   closes a file  <br> <span class="t-mark">(function)</span> 
</td>
</tr>

<tr class="t-dsc-sep">
<td colspan="2">
</td>
</tr>
<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div><a href="io/fflush.html" title="c/io/fflush"> <span class="t-lines"><span>fflush</span></span></a></div></div>
</td>
<td>   synchronizes an output stream with the actual file <br> <span class="t-mark">(function)</span> 
</td>
</tr>

<tr class="t-dsc-sep">
<td colspan="2">
</td>
</tr>
<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div><a href="io/fwide.html" title="c/io/fwide"> <span class="t-lines"><span>fwide</span></span></a></div></div>
</td>
<td>   switches a file stream between wide character I/O and narrow character I/O <br> <span class="t-mark">(function)</span> 
</td>
</tr>

<tr class="t-dsc-sep">
<td colspan="2">
</td>
</tr>
<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div><a href="io/setbuf.html" title="c/io/setbuf"> <span class="t-lines"><span>setbuf</span></span></a></div></div>
</td>
<td>   sets the buffer for a file stream <br> <span class="t-mark">(function)</span> 
</td>
</tr>

<tr class="t-dsc-sep">
<td colspan="2">
</td>
</tr>
<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div><a href="io/setvbuf.html" title="c/io/setvbuf"> <span class="t-lines"><span>setvbuf</span></span></a></div></div>
</td>
<td>   sets the buffer and its size for a file stream <br> <span class="t-mark">(function)</span> 
</td>
</tr>


<tr>
<td colspan="2"> <h5> <span class="mw-headline" id="Direct_input.2Foutput">  Direct input/output </span>
</h5>
</td>
</tr>

<tr class="t-dsc-sep">
<td colspan="2">
</td>
</tr>
<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div><a href="io/fread.html" title="c/io/fread"> <span class="t-lines"><span>fread</span></span></a></div></div>
</td>
<td>   reads from a file <br> <span class="t-mark">(function)</span> 
</td>
</tr>

<tr class="t-dsc-sep">
<td colspan="2">
</td>
</tr>
<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div><a href="io/fwrite.html" title="c/io/fwrite"> <span class="t-lines"><span>fwrite</span></span></a></div></div>
</td>
<td>   writes to a file <br> <span class="t-mark">(function)</span> 
</td>
</tr>


<tr>
<td colspan="2"> <h5> <span class="mw-headline" id="Unformatted_input.2Foutput">  Unformatted input/output </span>
</h5>
</td>
</tr>

<tr>
<td colspan="2"> <h5> <span class="mw-headline" id="Narrow_character">  <span style="font-size:0.7em; line-height:130%">Narrow character</span> </span>
</h5>
</td>
</tr>

<tr class="t-dsc-sep">
<td colspan="2">
</td>
</tr>
<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div><a href="io/fgetc.html" title="c/io/fgetc"> <span class="t-lines"><span>fgetc</span><span>getc</span></span></a></div></div>
</td>
<td>   gets a character from a file stream <br> <span class="t-mark">(function)</span> 
</td>
</tr>

<tr class="t-dsc-sep">
<td colspan="2">
</td>
</tr>
<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div><a href="io/fgets.html" title="c/io/fgets"> <span class="t-lines"><span>fgets</span></span></a></div></div>
</td>
<td>   gets a character string from a file stream <br> <span class="t-mark">(function)</span> 
</td>
</tr>

<tr class="t-dsc-sep">
<td colspan="2">
</td>
</tr>
<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div><a href="io/fputc.html" title="c/io/fputc"> <span class="t-lines"><span>fputc</span><span>putc</span></span></a></div></div>
</td>
<td>   writes a character to a file stream <br> <span class="t-mark">(function)</span> 
</td>
</tr>

<tr class="t-dsc-sep">
<td colspan="2">
</td>
</tr>
<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div><a href="io/fputs.html" title="c/io/fputs"> <span class="t-lines"><span>fputs</span></span></a></div></div>
</td>
<td>   writes a character string to a file stream <br> <span class="t-mark">(function)</span> 
</td>
</tr>

<tr class="t-dsc-sep">
<td colspan="2">
</td>
</tr>
<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div><a href="io/getchar.html" title="c/io/getchar"> <span class="t-lines"><span>getchar</span></span></a></div></div>
</td>
<td>   reads a character from <span class="t-lc"><strong class="selflink">stdin</strong></span> <br> <span class="t-mark">(function)</span> 
</td>
</tr>

<tr class="t-dsc-sep">
<td colspan="2">
</td>
</tr>
<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div><a href="io/gets.html" title="c/io/gets"> <span class="t-lines"><span>gets</span></span></a></div></div>
</td>
<td>   reads a character string from <code>stdin</code> <br> <span class="t-mark">(function)</span> 
</td>
</tr>

<tr class="t-dsc-sep">
<td colspan="2">
</td>
</tr>
<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div><a href="io/putchar.html" title="c/io/putchar"> <span class="t-lines"><span>putchar</span></span></a></div></div>
</td>
<td>    writes a character to <code>stdout</code> <br> <span class="t-mark">(function)</span> 
</td>
</tr>

<tr class="t-dsc-sep">
<td colspan="2">
</td>
</tr>
<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div><a href="io/puts.html" title="c/io/puts"> <span class="t-lines"><span>puts</span></span></a></div></div>
</td>
<td>   writes a character string to <span class="t-lc"><strong class="selflink">stdout</strong></span>  <br> <span class="t-mark">(function)</span> 
</td>
</tr>

<tr class="t-dsc-sep">
<td colspan="2">
</td>
</tr>
<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div><a href="io/ungetc.html" title="c/io/ungetc"> <span class="t-lines"><span>ungetc</span></span></a></div></div>
</td>
<td>   puts a character back into a file stream  <br> <span class="t-mark">(function)</span> 
</td>
</tr>


<tr>
<td colspan="2"> <h5> <span class="mw-headline" id="Wide_character">  <span style="font-size:0.7em; line-height:130%">Wide character</span> </span>
</h5>
</td>
</tr>

<tr class="t-dsc-sep">
<td colspan="2">
</td>
</tr>
<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div><a href="io/fgetwc.html" title="c/io/fgetwc"> <span class="t-lines"><span>fgetwc</span><span>getwc</span></span></a></div></div>
</td>
<td>   gets a wide character from a file stream <br> <span class="t-mark">(function)</span> 
</td>
</tr>

<tr class="t-dsc-sep">
<td colspan="2">
</td>
</tr>
<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div><a href="io/fgetws.html" title="c/io/fgetws"> <span class="t-lines"><span>fgetws</span></span></a></div></div>
</td>
<td>   gets a wide string from a file stream <br> <span class="t-mark">(function)</span> 
</td>
</tr>

<tr class="t-dsc-sep">
<td colspan="2">
</td>
</tr>
<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div><a href="io/fputwc.html" title="c/io/fputwc"> <span class="t-lines"><span>fputwc</span><span>putwc</span></span></a></div></div>
</td>
<td>   writes a wide character to a file stream <br> <span class="t-mark">(function)</span> 
</td>
</tr>

<tr class="t-dsc-sep">
<td colspan="2">
</td>
</tr>
<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div><a href="io/fputws.html" title="c/io/fputws"> <span class="t-lines"><span>fputws</span></span></a></div></div>
</td>
<td>   writes a wide string to a file stream <br> <span class="t-mark">(function)</span> 
</td>
</tr>

<tr class="t-dsc-sep">
<td colspan="2">
</td>
</tr>
<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div><a href="io/getwchar.html" title="c/io/getwchar"> <span class="t-lines"><span>getwchar</span></span></a></div></div>
</td>
<td>   reads a wide character from <code>stdin</code> <br> <span class="t-mark">(function)</span> 
</td>
</tr>

<tr class="t-dsc-sep">
<td colspan="2">
</td>
</tr>
<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div><a href="io/putwchar.html" title="c/io/putwchar"> <span class="t-lines"><span>putwchar</span></span></a></div></div>
</td>
<td>   writes a wide character to <span class="t-lc"><strong class="selflink">stdout</strong></span> <br> <span class="t-mark">(function)</span> 
</td>
</tr>

<tr class="t-dsc-sep">
<td colspan="2">
</td>
</tr>
<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div><a href="io/ungetwc.html" title="c/io/ungetwc"> <span class="t-lines"><span>ungetwc</span></span></a></div></div>
</td>
<td>   puts a wide character back into a file stream  <br> <span class="t-mark">(function)</span> 
</td>
</tr>


<tr>
<td colspan="2"> <h5> <span class="mw-headline" id="Formatted_input.2Foutput">  Formatted input/output </span>
</h5>
</td>
</tr>

<tr>
<td colspan="2"> <h5> <span class="mw-headline" id="Narrow_character_2">  <span style="font-size:0.7em; line-height:130%">Narrow character</span> </span>
</h5>
</td>
</tr>

<tr class="t-dsc-sep">
<td colspan="2">
</td>
</tr>
<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div><a href="io/fscanf.html" title="c/io/fscanf"> <span class="t-lines"><span>scanf</span><span>fscanf</span><span>sscanf</span></span></a></div></div>
</td>
<td>   reads formatted input from <span class="t-lc"><strong class="selflink">stdin</strong></span>, a file stream or a buffer <br> <span class="t-mark">(function)</span> 
</td>
</tr>

<tr class="t-dsc-sep">
<td colspan="2">
</td>
</tr>
<tr class="t-dsc">
<td>  <div class="t-dsc-member-div">
<div><a href="io/vfscanf.html" title="c/io/vfscanf"> <span class="t-lines"><span>vscanf</span><span>vfscanf</span><span>vsscanf</span></span></a></div>
<div><span class="t-lines"><span><span class="t-mark-rev t-since-c99">(C99)</span></span><span><span class="t-mark-rev t-since-c99">(C99)</span></span><span><span class="t-mark-rev t-since-c99">(C99)</span></span></span></div>
</div>
</td>
<td>   reads formatted input from <span class="t-lc"><strong class="selflink">stdin</strong></span>, a file stream or a buffer<br> using variable argument list <br> <span class="t-mark">(function)</span> 
</td>
</tr>

<tr class="t-dsc-sep">
<td colspan="2">
</td>
</tr>
<tr class="t-dsc">
<td>  <div class="t-dsc-member-div">
<div><a href="io/fprintf.html" title="c/io/fprintf"> <span class="t-lines"><span>printf</span><span>fprintf</span><span>sprintf</span><span>snprintf</span></span></a></div>
<div><span class="t-lines"><span></span><span></span><span></span><span><span class="t-mark-rev t-since-c99">(C99)</span></span></span></div>
</div>
</td>
<td>   prints formatted output to <span class="t-lc"><strong class="selflink">stdout</strong></span>, a file stream or a buffer  <br> <span class="t-mark">(function)</span> 
</td>
</tr>

<tr class="t-dsc-sep">
<td colspan="2">
</td>
</tr>
<tr class="t-dsc">
<td>  <div class="t-dsc-member-div">
<div><a href="io/vfprintf.html" title="c/io/vfprintf"> <span class="t-lines"><span>vprintf</span><span>vfprintf</span><span>vsprintf</span><span>vsnprintf</span></span></a></div>
<div><span class="t-lines"><span></span><span></span><span></span><span><span class="t-mark-rev t-since-c99">(C99)</span></span></span></div>
</div>
</td>
<td>   prints formatted output to <span class="t-lc"><strong class="selflink">stdout</strong></span>, a file stream or a buffer<br> using variable argument list  <br> <span class="t-mark">(function)</span> 
</td>
</tr>


<tr>
<td colspan="2"> <h5> <span class="mw-headline" id="Wide_character_2">  <span style="font-size:0.7em; line-height:130%">Wide character</span> </span>
</h5>
</td>
</tr>

<tr class="t-dsc-sep">
<td colspan="2">
</td>
</tr>
<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div><a href="io/fwscanf.html" title="c/io/fwscanf"> <span class="t-lines"><span>wscanf</span><span>fwscanf</span><span>swscanf</span></span></a></div></div>
</td>
<td>   reads formatted wide character input from <span class="t-lc"><strong class="selflink">stdin</strong></span>, a file stream or a buffer <br> <span class="t-mark">(function)</span> 
</td>
</tr>

<tr class="t-dsc-sep">
<td colspan="2">
</td>
</tr>
<tr class="t-dsc">
<td>  <div class="t-dsc-member-div">
<div><a href="io/vfwscanf.html" title="c/io/vfwscanf"> <span class="t-lines"><span>vwscanf</span><span>vfwscanf</span><span>vswscanf</span></span></a></div>
<div><span class="t-lines"><span><span class="t-mark-rev t-since-c99">(C99)</span></span><span><span class="t-mark-rev t-since-c99">(C99)</span></span><span><span class="t-mark-rev t-since-c99">(C99)</span></span></span></div>
</div>
</td>
<td>   reads formatted wide character input from <span class="t-lc"><strong class="selflink">stdin</strong></span>, a file stream<br> or a buffer using variable argument list <br> <span class="t-mark">(function)</span> 
</td>
</tr>

<tr class="t-dsc-sep">
<td colspan="2">
</td>
</tr>
<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div><a href="io/fwprintf.html" title="c/io/fwprintf"> <span class="t-lines"><span>wprintf</span><span>fwprintf</span><span>swprintf</span></span></a></div></div>
</td>
<td>   prints formatted wide character output to <span class="t-lc"><strong class="selflink">stdout</strong></span>, a file stream or a buffer <br> <span class="t-mark">(function)</span> 
</td>
</tr>

<tr class="t-dsc-sep">
<td colspan="2">
</td>
</tr>
<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div><a href="io/vfwprintf.html" title="c/io/vfwprintf"> <span class="t-lines"><span>vwprintf</span><span>vfwprintf</span><span>vswprintf</span></span></a></div></div>
</td>
<td>   prints formatted wide character output to <span class="t-lc"><strong class="selflink">stdout</strong></span>, a file stream<br> or a buffer using variable argument list <br> <span class="t-mark">(function)</span> 
</td>
</tr>


<tr>
<td colspan="2"> <h5> <span class="mw-headline" id="File_positioning">  File positioning </span>
</h5>
</td>
</tr>

<tr class="t-dsc-sep">
<td colspan="2">
</td>
</tr>
<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div><a href="io/ftell.html" title="c/io/ftell"> <span class="t-lines"><span>ftell</span></span></a></div></div>
</td>
<td>   returns the current file position indicator <br> <span class="t-mark">(function)</span> 
</td>
</tr>

<tr class="t-dsc-sep">
<td colspan="2">
</td>
</tr>
<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div><a href="io/fgetpos.html" title="c/io/fgetpos"> <span class="t-lines"><span>fgetpos</span></span></a></div></div>
</td>
<td>   gets the file position indicator <br> <span class="t-mark">(function)</span> 
</td>
</tr>

<tr class="t-dsc-sep">
<td colspan="2">
</td>
</tr>
<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div><a href="io/fseek.html" title="c/io/fseek"> <span class="t-lines"><span>fseek</span></span></a></div></div>
</td>
<td>   moves the file position indicator to a specific location in a file <br> <span class="t-mark">(function)</span> 
</td>
</tr>

<tr class="t-dsc-sep">
<td colspan="2">
</td>
</tr>
<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div><a href="io/fsetpos.html" title="c/io/fsetpos"> <span class="t-lines"><span>fsetpos</span></span></a></div></div>
</td>
<td>   moves the file position indicator to a specific location in a file <br> <span class="t-mark">(function)</span> 
</td>
</tr>

<tr class="t-dsc-sep">
<td colspan="2">
</td>
</tr>
<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div><a href="io/rewind.html" title="c/io/rewind"> <span class="t-lines"><span>rewind</span></span></a></div></div>
</td>
<td>   moves the file position indicator to the beginning in a file <br> <span class="t-mark">(function)</span> 
</td>
</tr>


<tr>
<td colspan="2"> <h5> <span class="mw-headline" id="Error_handling">  Error handling </span>
</h5>
</td>
</tr>

<tr class="t-dsc-sep">
<td colspan="2">
</td>
</tr>
<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div><a href="io/clearerr.html" title="c/io/clearerr"> <span class="t-lines"><span>clearerr</span></span></a></div></div>
</td>
<td>   clears errors <br> <span class="t-mark">(function)</span> 
</td>
</tr>

<tr class="t-dsc-sep">
<td colspan="2">
</td>
</tr>
<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div><a href="io/feof.html" title="c/io/feof"> <span class="t-lines"><span>feof</span></span></a></div></div>
</td>
<td>   checks for the end-of-file <br> <span class="t-mark">(function)</span> 
</td>
</tr>

<tr class="t-dsc-sep">
<td colspan="2">
</td>
</tr>
<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div><a href="io/ferror.html" title="c/io/ferror"> <span class="t-lines"><span>ferror</span></span></a></div></div>
</td>
<td>   checks for a file error <br> <span class="t-mark">(function)</span> 
</td>
</tr>

<tr class="t-dsc-sep">
<td colspan="2">
</td>
</tr>
<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div><a href="io/perror.html" title="c/io/perror"> <span class="t-lines"><span>perror</span></span></a></div></div>
</td>
<td>   displays a character string corresponding of the current error to <span class="t-lc"><strong class="selflink">stderr</strong></span> <br> <span class="t-mark">(function)</span> 
</td>
</tr>


<tr>
<td colspan="2"> <h5> <span class="mw-headline" id="Operations_on_files">  Operations on files </span>
</h5>
</td>
</tr>

<tr class="t-dsc-sep">
<td colspan="2">
</td>
</tr>
<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div><a href="io/remove.html" title="c/io/remove"> <span class="t-lines"><span>remove</span></span></a></div></div>
</td>
<td>   erases a file <br> <span class="t-mark">(function)</span> 
</td>
</tr>

<tr class="t-dsc-sep">
<td colspan="2">
</td>
</tr>
<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div><a href="io/rename.html" title="c/io/rename"> <span class="t-lines"><span>rename</span></span></a></div></div>
</td>
<td>   renames a file <br> <span class="t-mark">(function)</span> 
</td>
</tr>

<tr class="t-dsc-sep">
<td colspan="2">
</td>
</tr>
<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div><a href="io/tmpfile.html" title="c/io/tmpfile"> <span class="t-lines"><span>tmpfile</span></span></a></div></div>
</td>
<td>   returns a pointer to a temporary file <br> <span class="t-mark">(function)</span> 
</td>
</tr>

<tr class="t-dsc-sep">
<td colspan="2">
</td>
</tr>
<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div><a href="io/tmpnam.html" title="c/io/tmpnam"> <span class="t-lines"><span>tmpnam</span></span></a></div></div>
</td>
<td>   returns a unique filename <br> <span class="t-mark">(function)</span> 
</td>
</tr>
</table>
<h3>
<span class="editsection">[<a href="http%3A//en.cppreference.com/mwiki/index.php" title="Edit section: Types">edit</a>]</span> <span class="mw-headline" id="Types">Types</span>
</h3>
<table class="t-dsc-begin">

<tr class="t-dsc-header">
<td colspan="2"> <div>Defined in header <code>&lt;stdio.h&gt;</code> </div>
</td>
</tr>

<tr class="t-dsc-sep">
<td colspan="2">
</td>
</tr>
<tr class="t-dsc-hitem">
<td>  Type
</td>
<td>  Definition
</td>
</tr>


<tr class="t-dsc-sep">
<td colspan="2">
</td>
</tr>
<tr class="t-dsc">
<td>  <span class="t-lc"><strong class="selflink">FILE</strong></span>
</td>
<td>  type, capable of holding all information needed to control a C I/O stream
</td>
</tr>


<tr class="t-dsc-sep">
<td colspan="2">
</td>
</tr>
<tr class="t-dsc">
<td>  <span class="t-lc"><strong class="selflink">fpos_t</strong></span>
</td>
<td>  type, capable of uniquely specifying a position in a file
</td>
</tr>

</table>
<h3>
<span class="editsection">[<a href="http%3A//en.cppreference.com/mwiki/index.php" title="Edit section: Macros">edit</a>]</span> <span class="mw-headline" id="Macros">Macros</span>
</h3>
<table class="t-dsc-begin">

<tr class="t-dsc-header">
<td colspan="2"> <div>Defined in header <code>&lt;stdio.h&gt;</code> </div>
</td>
</tr>

<tr class="t-dsc-sep">
<td colspan="2">
</td>
</tr>
<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div>stdin<br>stdout<br>stderr</div></div>
</td>
<td>   expression of type FILE* associated with the input stream<br>expression of type FILE* associated with the output stream<br>expression of type FILE* associated with the error output stream <br> <span class="t-mark">(macro constant)</span>
</td>
</tr>


<tr class="t-dsc-sep">
<td colspan="2">
</td>
</tr>
<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div>EOF</div></div>
</td>
<td>   integer constant expression of type <span class="t-c"><span class="mw-geshi c source-c"><span class="kw4">int</span></span></span> and negative value  <br> <span class="t-mark">(macro constant)</span>
</td>
</tr>


<tr class="t-dsc-sep">
<td colspan="2">
</td>
</tr>
<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div>FOPEN_MAX</div></div>
</td>
<td>   number of files that can be open simultaneously  <br> <span class="t-mark">(macro constant)</span>
</td>
</tr>


<tr class="t-dsc-sep">
<td colspan="2">
</td>
</tr>
<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div>FILENAME_MAX</div></div>
</td>
<td>   size needed for an array of char to hold the longest supported file name <br> <span class="t-mark">(macro constant)</span>
</td>
</tr>


<tr class="t-dsc-sep">
<td colspan="2">
</td>
</tr>
<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div>BUFSIZ</div></div>
</td>
<td>   size of the buffer used by setbuf()  <br> <span class="t-mark">(macro constant)</span>
</td>
</tr>


<tr class="t-dsc-sep">
<td colspan="2">
</td>
</tr>
<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div>_IOFBF<br>_IOLBF<br>_IONBF</div></div>
</td>
<td>  argument to setvbuf() indicating fully buffered I/O<br>argument to setvbuf() indicating line buffered I/O<br>argument to setvbuf() indicating unbuffered I/O <br> <span class="t-mark">(macro constant)</span>
</td>
</tr>


<tr class="t-dsc-sep">
<td colspan="2">
</td>
</tr>
<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div>SEEK_SET<br>SEEK_CUR<br>SEEK_END</div></div>
</td>
<td>   argument to fseek() indicating seeking from beginning of the file<br>argument to fseek() indicating seeking from the current file position<br>argument to fseek() indicating seeking from end of the file <br> <span class="t-mark">(macro constant)</span>
</td>
</tr>


<tr class="t-dsc-sep">
<td colspan="2">
</td>
</tr>
<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div>TMP_MAX</div></div>
</td>
<td>   maximum number of unique filenames that can be generated by tmpnam() <br> <span class="t-mark">(macro constant)</span>
</td>
</tr>


<tr class="t-dsc-sep">
<td colspan="2">
</td>
</tr>
<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div>L_tmpnam</div></div>
</td>
<td>    size needed for an array of char to hold the result of tmpnam() <br> <span class="t-mark">(macro constant)</span>
</td>
</tr>

</table>
<h3>
<span class="editsection">[<a href="http%3A//en.cppreference.com/mwiki/index.php" title="Edit section: See also">edit</a>]</span> <span class="mw-headline" id="See_also">See also</span>
</h3>
<table class="t-dsc-begin">

<tr class="t-dsc-sep">
<td colspan="2">
</td>
</tr>
<tr class="t-dsc">
<td colspan="2"> <div class="t-dsc-see">
<span><a href="../cpp/io/c.html" title="cpp/io/c">C++ documentation</a></span> for <span class="t-dsc-see-tt"><span>C-style file input/output</span></span>
</div>
</td>
</tr>

</table>

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